Units of Weights and Measurements for Troy Units.

   This is for those who find themselves wondering how much metal is in the coin or coins they are looking at. Instead of guessing what they are     bidding on,  they can use this chart to get a better idea of the size of the coin(s).   I myself have found this helpful when purchasing older type coins and even small amounts of Gold.  

   1. Troy Pound (0.37kg):
      A mass unit is used to measure precious metals. There are 12 troy ounces in every troy pound. One troy pound is equal to 373 grams.

   2. Troy Ounce:
      The traditional unit of weight for precious metals and gems.
      1 troy ounce = 480 grains
      1 troy ounce = 24 scruples
      1 troy ounce = 20 pennyweights (North American jewelery trade)
      1 troy ounce = 1.097 ordinary ounce
      1 troy ounce = 8 drams
      1 troy ounce = 31.1034768 grams.
      1 troy ounce = 120 carats
      1 troy ounce = 155.52 metric carats (diamonds / precious stones).
      3.75 troy ounces = 10 tolas (Indian sub-continent)
      6.02 troy ounces = 5 taels (Hong Kong)
      12 troy ounce=1 troy pound
      14.583 troy ounce =16 avoirdupois ounce (1Pound)
      32.15 troy ounces = 1 kilogramme (Kilo)
      32,150 troy ounces = 1 metric ton (1,000 kilos)
      1000 troy ounces = 31.1 kilograms

   3. pennyweight (dwt):
      The pennyweight was the weight of a silver penny in medieval England.
      It is no coincidence that there were 240 pennies to the English pound.
      240 silver pennies were equivalent to a pound of silver.
      The word sterling applies both to the English pound and to the standard
      purity of silver.
      1 pennyweight = 24 grains (dwt) (1 old time French penny)
      1.55 grams=1 pennyweight (dwt)
      20 dwt=1 troy ounce
      240 pennyweights = 1 pound troy
      24 grains=1 dwt
      1 pennyweight =.05 troy ounce
      1 gram=.643 pennyweight

   4. Gram:
      1 gram =.03215 troy ounce
      1 gram =.643 pennyweight
      1.555 grams = 1 pennyweight (dwt)
      1 gram =0.00267923 apothecary or troy pound
      1 gram =0.00220462 avoirdupois pound
      1 gram =0.0321507 apothecary or troy ounce
      1 gram =0.564383 avoirdupois dram
      1 gram =0.257206 apothecary or troy dram
      1 gram =0.6430149 pennyweight
      1 gram =0.771618 scruple
      1 gram =15.4324 grains
      1 gram =1x10^-6 metric ton
      1 gram =1x10^-4 myriagram
      1 gram =0.001 kilogram
      1 gram =5 metric carats
      1 gram =1000 milligrams
      1 gram =1x10^6 microgram
      1 Gram = 5 Carats

   5. Grain:
      An ancient unit which was originally based on the weight of a grain of wheat. The grain is the smallest unit of weight in the avoirdupois, troy, and apothecaries systems. Surprisingly it is identical in all three systems.
      1 grain = 64.8 milligrams
      1 grain = 0.0648 grams
      4 grains = 1 carat
      15.432 grains = 1 gram
      20 grains = 1 scruple
      24 grains =1 pennyweight
      480 grains = 1 troy ounce
      5760 grains = 1 troy pound
      437.5 grains = 1 ounce avoirdupois
      7000 grains = 1 pound avoirdupois
      Grain = 1/7000 avoirdupois pound
      Grain = 1/5760 apothecary or troy pound
      Grain = 0.0022857 avoirdupois ounce
      Grain = 0.0020833 apothecary or troy ounce
      Grain = 0.03657143 avoirdupois dram
      Grain = 0.016667 apothecary or troy dram
      Grain = 0.0416667 troy pennyweight
      Grain = 0.05000 apothecary scruple
      Grain =0.064798918 gram
      Grain =0.3240 metric carat
      Grain =64.798918 milligram